Clicker Question22: Coordination ChemistryCoordinate Covalent BondsCoordinate Covalent BondsCoordinate Covalent BondsCoordinate Covalent BondsNaming Coordination ComplexesNaming Complex IonsNaming Complex IonsNaming Complex IonsNaming Complex IonsNomenclature SummaryLigand NamesCommon Ligands to KnowChelating LigandsClicker QuestionCoordination NumberClicker QuestionWhat metal ion would have the electron configuration [Kr]4d8 in the +2 oxidation state?1. Pd2+2. Ru2+3. Cd2+4. Tc2+22: Coordination Chemistry22.1 Properties of the Transition Elements 22.2 Iron and Steel: The Use of Pyrometallurgy22.3 Copper: A Coinage Metal22.4 Silver and Gold: The Other Coinage Metals22.5 Chromium22.6 Coordinate Covalent Bonds22.7 Crystal-Field TheoryFriday, October 31, 2014Read: Section 22.1 for Friday Sections 22.2, 22.3 and 22.4 MondayEnd of Chapter 22 Problems: 8, 14, 16, 18, 20, 21, 22, 26, 28, 30, 32, 34, 36, 38, 40, 42, 44, 46, 48, 50, 52, 54, 56, 58, 60, 62, 63, 65, 67, 73, 75, 77, 78, 79, 83, 85, 91Friday, October 31, 2014Read: Section 22.1 for Friday Sections 22.2, 22.3 and 22.4 MondayEnd of Chapter 22 Problems: 8, 14, 16, 18, 20, 21, 22, 26, 28, 30, 32, 34, 36, 38, 40, 42, 44, 46, 48, 50, 52, 54, 56, 58, 60, 62, 63, 65, 67, 73, 75, 77, 78, 79, 83, 85, 91Coordinate Covalent Bonds•An ion where ligands are bound to a central metal is a complex ion[Ni(H2O)6]2+ has 6 H2O bound to Ni2+ [Ni(Cl)4]2- has 4 Cl- bound to Ni2+ Writing complex ions: [metal(ligand formula)]ion chargeCoordinate Covalent Bonds•What is the correct formula for the following complex?1. [Fe(NH3)2(OH)2Cl2]2+2. [Fe(NH3)2(OH)2Cl2]2-3. [Fe(NH3)(OH)Cl]2-Coordinate Covalent BondsCoordination compounds are often brightly colored:[Ni(NH3)6]Cl2 contains the complex ion [Ni(NH3)6]2+ and 2 Cl- counter ions to balance the charge.Counter ions are not always needed cisplatin: Pt(NH3)2Cl2[Ni(H2O)6](NO3)2 [Ni(NH3)6]Cl2Coordinate Covalent BondsWhat is the oxidation state of iron in the following complex? K3[Fe(OH)6]1. Fe02. Fe+3. Fe2+4. Fe3+•Naming coordination complexesCo(NH3)3(OH)3•Ligands are named in alphabetical order•Ligand number is indicated using di-, tri-, tetra-, penta-, hexa-•Metal name and oxidation state are written at the endNaming Coordination Complexes•Complex Cations[Fe(H2O)2(NH3)4]Cl3•Cations are named first•Metal name and oxidation state follow ligand names•Number of counterions is not writtenNaming Complex Ions•Complex Anions•Cations are named first•Metal name and oxidation state follow ligand names•Number of counterions is not written•For complex anions, the metal ion’s name ends in -ateNaming Complex Ions[Ni(H2O)6](NO3)2 [Ni(NH3)6]Cl2 Co(NH3)3(OH)3Pt(NH3)2Cl2[Fe(H2O)2(NH3)4]Cl3Complex-anion namingK2[Cr(NH3)2Cl4]Naming Complex Ions•Name the following coordination compound[Cr(NH3)2(H2O)3(OH)]Cl21. chromium(III)diamminetriaquahydroxo chloride2. diamminetriaquahydroxochromium(III) dichloride3. diamminetriaquahydroxochromium(III) chlorideNaming Complex IonsGeneral•Ligands are named in alphabetical order•Ligand number is indicated using di-, tri-, tetra-, penta-, hexa-•Metal name and oxidation state are written at the endComplex ions•Cations are named first•Metal name and oxidation state follow ligand names•Number of counterions is not written•For complex anions, the metal ion’s name ends in -ateNomenclature SummaryLigand NamesNeutral Ligand NameNH3AmmineCO CarbonylH2NCH2CH2NH2Ethylenediamine (en)H2O AquaAnionic Ligand NameBr-BromoCl-ChloroCN-CyanoF-FluoroOH-HydroxoCO32-CarbonatoC2O42-Oxalato (ox)SCN-ThiocyanatoNCS-Isothiocyanato (“-ide” becomes “–o”)Common Ligands to KnowMonodentate ligandsOH HNH HH-Water Ammonia Chloride ion Cyanide ion Carbon monoxide Hydroxide ionC ≡ N-C = OO–H-ClN–CH2–CH2–NCH2–C–O CH2–C–O ||O||O||O||OO–C–CH2 O–C–CH2 Hexadentate ligand4-Ethylenediaminetetraacetate ion (EDTA)Bidentate ligandsO||CO OOOC–COOH2C–CH2NH2H2NNN2-2-Carbonate ion Oxalate ion (ox)Ethylenediamine Ortho-phenanthroline (en) (phen)Chelating LigandsChelating ligands “grab” metal ions.They are polydentate ligands (donating ≥ 2 e-pairs).EDTA is hexadentate. 6 coordinate covalent bonds form:•2 N atoms (blue spheres)•4 O atoms (red spheres)EDTA encapsulates insolublemetal ions, making them soluble.MClicker QuestionA coordination compound is one thata. Is formed between alkali metals or alkaline earths and halogensb. Is formed from a transition metal, ligands, and enough counter ions to produce a neutral compoundc. Aids in balance, and is found at enhanced levels in elite gymnasts and dancersd. Results from a neutralization reactione. Is formed when elements of the third period react with halogensCoordination NumberCoordination number = number of coordinate covalent bonds between a metal ion and its ligands Coordination Examples Number2 [Ag(NH3)2]+, K[AuCl2]4 [Pt(NH3)4]2+, K2[NiCl4]6 [Fe(H2O)6]2+, [Co(NH3)6]Cl3One-bond ligands = monodentate (CN = 1)Two-bond ligands = bidentate (CN = 2)Denticity of a